Model comparison
Claude Opus 5.5 vs Olmo 3.1 32b Instruct
Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 39.4 on the Noometry Index.
Last verified . 14 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 14 benchmarks with published results for both. Claude Opus 5.5 scores higher in 8 categories and Olmo 3.1 32b Instruct in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Opus 5.5 leads 91.8 to 36.3.
- Olmo 3.1 32b Instruct has downloadable open weights; the other is API-only.
Side by side
| Claude Opus 5.5 | Olmo 3.1 32b Instruct | |
|---|---|---|
| Provider | Anthropic | Allen Institute for AI (Ai2) |
| Noometry Index | 68.6 | 39.4 |
| Released | 2026-09-22 | — |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $4 | — |
| Output $ / M tokens | $20 | — |
| Results tracked | 44 | 16 |
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Category by category
Coding Claude Opus 5.5 leads
Claude Opus 5.5: 71.9 (#3), Olmo 3.1 32b Instruct: 39.5 (#157)
| Benchmark | Claude Opus 5.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Coding | 1547 | 1347 |
| FrontierCode | 54.6% | — |
| CursorBench | 57.8% | — |
| LMArena WebDev | 1813 | — |
| FrontierSWE | 62.3% | — |
| SciCode | 66.9% | — |
| MirrorCode | 77.4% | — |
| ALE-Bench | 2,147 | — |
Agentic & Tool Use Not comparable
Claude Opus 5.5: 45.3 (#15), Olmo 3.1 32b Instruct: —
| Benchmark | Claude Opus 5.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| APEX-Agents | 73.5% | — |
| GDP.pdf | 30.6% | — |
| Vending-Bench 2 | 9,235 | — |
Reasoning Claude Opus 5.5 leads
Claude Opus 5.5: 80.2 (#3), Olmo 3.1 32b Instruct: 26.4 (#132)
| Benchmark | Claude Opus 5.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Hard Prompts | 1535 | 1322 |
| ARC-AGI-2 | 93.3% | — |
| NYT Connections (extended) | 88.5% | — |
| ARC-AGI-1 | 98.5% | — |
| CritPt | 31.7% | — |
| EBR-Bench | 71.4% | — |
| Mystery Game Puzzles | 71% | — |
| DTBench | 98.9% | — |
| LMCA | 68.2% | — |
| Epoch Capabilities Index | 167.33 | — |
Math Claude Opus 5.5 leads
Claude Opus 5.5: 91.8 (#3), Olmo 3.1 32b Instruct: 36.3 (#167)
| Benchmark | Claude Opus 5.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Math | 1506 | 1305 |
| FrontierMath (Tiers 1-3) | 91.2% | — |
| FrontierMath Tier 4 | 95% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| FrontierMath Erdős | 2.9% | — |
Knowledge Claude Opus 5.5 leads
Claude Opus 5.5: 66.4 (#10), Olmo 3.1 32b Instruct: 36.1 (#175)
| Benchmark | Claude Opus 5.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Expert | 1547 | 1308 |
| GPQA Diamond | 90.6% | — |
| SimpleQA Verified | 72.2% | — |
Multimodal Not comparable
Claude Opus 5.5: 57.8 (#1), Olmo 3.1 32b Instruct: —
| Benchmark | Claude Opus 5.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Vision | 1321 | — |
| Blueprint-Bench 2 | 51.2% | — |
| Furniture Assembly | 83.3% | — |
Multilingual Claude Opus 5.5 leads
Claude Opus 5.5: 59.1 (#2), Olmo 3.1 32b Instruct: 42.6 (#191)
| Benchmark | Claude Opus 5.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Non-English | 1507 | 1275 |
| LMArena Chinese | 1588 | 1304 |
| LMArena French | 1514 | 1328 |
| LMArena Russian | 1520 | 1268 |
| LMArena Spanish | 1507 | 1336 |
| LMArena German | — | 1282 |
| LMArena Korean | — | 1206 |
Instruction Following Claude Opus 5.5 leads
Claude Opus 5.5: 80.0 (#3), Olmo 3.1 32b Instruct: 68.6 (#187)
| Benchmark | Claude Opus 5.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Instruction Following | 1537 | 1299 |
Long Context Claude Opus 5.5 leads
Claude Opus 5.5: 47.1 (#19), Olmo 3.1 32b Instruct: 39.9 (#166)
| Benchmark | Claude Opus 5.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Longer Query | 1532 | 1312 |
Writing & Preference Claude Opus 5.5 leads
Claude Opus 5.5: 78.2 (#3), Olmo 3.1 32b Instruct: 50.2 (#185)
| Benchmark | Claude Opus 5.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Text | 1515 | 1311 |
| LMArena Creative Writing | 1533 | 1264 |
| LMArena Multi-Turn | 1499 | 1309 |
| EQ-Bench Creative Writing | 2050 | — |
Frequently asked questions
Is Claude Opus 5.5 better than Olmo 3.1 32b Instruct?
Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 39.4 on the Noometry Index.
Is Claude Opus 5.5 or Olmo 3.1 32b Instruct better for coding?
Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 39.5 in the Noometry coding category.
How many benchmarks do Claude Opus 5.5 and Olmo 3.1 32b Instruct share?
14 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Olmo 3.1 32b Instruct has 16.